Fuji Electric Frenic Mega Series - Page 93

2.4 Protective Functions
2-40
Table 2.4-2
Name Description
LED
monitor
displays
Alarm output
[30A/B/C]
(Note)
Overspeed
- When d35 = 999, stops the inverter if the detected speed is 120%
or over of the maximum output frequency × (d32 or d33). *1 to *4
- When d35 ≠ 999, stops the inverter if the detected speed is greater
than or equal to the maximum output frequency × (d35). *3, *6
- Stops the inverter if the detected speed is 120% or over of 120 Hz.
*3
- Stops the inverter if the detected speed is 120% or over of 200 Hz.
*4
0s Yes
PG wire break
*1,*2,*4
Stops the inverter output if a PG wire break is detected.
pg Yes
The inverter stops running to protect the motor in accordance with
the electronic thermal overload protection setting.
Electronic
thermal
overload
- Protects general-purpose motors over the entire frequency range.
- Protects inverter motors over the entire frequency range.
* The operation level and thermal time constant can be set. (0.5 to
75.0 minutes)
0l1
0l2
0l3
0l4
Yes*
Upon detecting an abnormal motor temperature, the PTC thermistor
stops the inverter to protect the motor.
PTC
thermistor
Connect a PTC thermistor between terminals [V2] and [11] and set
the function codes and slide switch on the control PCB accordingly.
The NTC thermistor detects the motor temperature.
NTC
thermistor
Connect an NTC thermistor between terminals [V2] and [11] and set
the function codes and slide switch on the control PCB accordingly.
0h4 Yes*
NTC
thermistor
wire break
Stops the inverter upon detecting a wire break in the NTC thermistor
embedded in the motor.
nrb Yes
Motor protection
Overload
early
warning
Outputs a preliminary alarm (0L) at a preset level before the inverter
is stopped by the electronic thermal overload protection for the
motor.
(Only for the first motor only)
- -
Memory error
detection
The inverter checks memory data after power-on and when the data
is written. If a memory error is detected, the inverter stops.
er1 Yes
Keypad
communications
error detection
Stops the inverter output upon detecting a communications error
between the inverter and the keypad during operation using the
keypad.
er2 Yes
CPU error
detection
If the inverter detects a CPU error or LSI error caused by noise or
some other factors, this function stops the inverter.
er3 Yes
Option
communications
error detection
Upon detection of an error in the communication between the
inverter and an optional card, this function stops the inverter output.
er4 Yes
Option error
detection
When an option card has detected an error, this function stops the
inverter output.
er5 Yes